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Cisco Systems 1500 User Manual 2

Product Overview

This chapter describes the Cisco Metro 1500 series metropolitan area network (MAN) dense wavelength division multiplexing (DWDM) system, and includes the following sections:
• Product Description, page 1-1
• Communication Channels, page 1-2
• Chassis, page 1-11
• System Modules, page 1-15

Product Description

The Cisco Metro 1500 series system is a high-performance, wavelength division multiplexer that provides bidirectional data communication. It is designed for communication over optical links in which different devices or applications are communicating over multiple fibers. Using wavelength conversion, several devices can communicate while being connected over one duplex fiber or two single fibers.
The Cisco Metro 1500 series system expands the distance and application capabilities of existing local area networks (LANs), metropolitan area networks (MANs), and storage area networks (SANs). It is protocol-independent and can support virtually any fiber-optic device.
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Communication Channels

The Cisco Metro 1500 series operatesusingtheInternationalTelecommunication Union (ITU) wavelength grid of 200-GHz channel spacing. It receives the signal from the local device and convertsitto the desired wavelength. Only single-mode fibers (remote or trunk fibers) are used for multiplexed data transmission.
The Cisco Metro 1500 series system provides communication within a broad range of data rates, up to 2.488 Gbps, and within a guaranteed optical budget. The system is transparent to any data communication protocol except wavelength channel modules (WCMs) with clock recovery. For more details on data rates, optical budgets, and supported protocols, see Appendix A, “Specifications.”
The Cisco Metro 1500 series system also provides monitoring and service functions such as loss of light and bit-rate control, as well as local and remote loopback.
Communication Channels
DWDM technology allows different channels to be combined for transportation over one fiber pair. A pair of multiplexer (MUX) and demultiplexer (DMX) modules assemble the channels into four groups of up to eight channels. The band splitter module (BSM) assembles and disassembles the four groups for the two remote fibers.
The optional remote switch module (RSM) provides line protection to the system. If the working line fails, the RSM routes the combined service automatically to a backup line. If used, the RSM is installed only in the primary chassis.
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Chapter 1 Product Overview
Figure 1-1 shows the multiplexer architecture.
Figure 1-1 Multiplexer Architecture
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Communication Channels

Primary and Extension Chassis

The Cisco Metro 1500 series system has a modular structure so you can expand the system while it is in use. Adding or removing channels does not affect the other working channels. Figure 1-2 shows a typical Cisco Metro 1500 series system configuration containing a primary chassis and three extension chassis.
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Figure 1-2 Typical Cisco Metro 1500 Series Configuration
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Communication Channels

Expansion Modules

The Cisco Metro 1500 series system requires two identical WCMs to complete a full communications link, one at each end of the link. Each system unit includes a primary chassis (see Figure 1-3) that holds up to eight WCMs. The WCMs transport up to eight independent channels.
Figure 1-3 Primary Chassis
Chapter 1 Product Overview
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The Cisco Metro 1500 series system can be expanded by adding more WCMs. Adding extension chassis A, B, and C (Figure 1-4 to Figure 1-6) at both ends of the communications link upgrades the system to transport a total of 32 independent channels. A network element management interface (NEMI) can control up to two chassis and up to four NEMIs can be combined through an Ethernet hub or switch to appear as a single system as seen by a Network Management System (NMS). Werecommend that you initially install the primary chassis and extension chassis A, which holds the BSM, to avoid service interruption while upgrading the unit to more than eight channels. The primary chassis and the extension chassis are each equipped with two fully redundant load-sharing, hot-swappable power supply modules (PSMs), as shown in Figure 1-3 to Figure 1-6.
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Figure 1-4 Extension Chassis A
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Figure 1-6 Extension Chassis C
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Figure 1-7 shows the rear view of the primary chassis and extension chassis.
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Figure 1-7 Rear View of the Chassis
AC power
connectors
Fuse 2
Power 1Power 2
Fuse
holders
Fan module
Voltage: Max. Current: Power Consumption: Fuse:
For continued protection against risk of fire replace
Fuse 1
only with same type and ratings of fuse. For proper selection of power supply cord refer to instruction manual.
Made in Germany March 1998
Instructions for
power supply
115/230 V 50/60 Hz
2.5 A max. 100W 2x T2.5A / 250V
!
Always remove both power cords when dis­connecting from power source 1.
FSP - II/1/WDM Manufactured:March 2000
BASE-F2Z-D2-A1-ZZ
Model:
AD-23-W349
Serial-No.:
ADVA AG, 98617 Meiningen, Jerusalemer Straße 13, Germany
Identification
plate
Communication Channels
Only valid if all modules and/or blind panels are in place
.
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marks
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Each chassis is delivered with one to eight WCMs, according to the configuration ordered. Each WCM provides the conversion of the local or remote channels to their respective wavelengths. All modules are hot-swappable and can be repaired or upgraded while theotherWCMsareinuse.WCMssupportawiderangeofdata rates. For more information on data rates, optical budgets, and supported protocols,seeAppendix A, “Specifications,” and Appendix E, “UnitMaintenance and Network Record.”
The RSM is available as an option. The RSM provides the system with 1+1 line protection and is installed in the primary chassis only. (See Figure 1-3).
The primary chassis and extension chassis B also include the network element management interface (NEMI) module. Extension chassis A and C includes an optional device element management interface (DEMI) module. For information on the NEMI and DEMI, refer to the Cisco Metro 1500 Series Software Configuration Guide.
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Communication Channels
Each WCM has fiber-optic cables attached to its front panel. The remote lines of each WCM are connected to the MUX and DMX of the chassis. The common input and output connections of MUXs and DMXs (M1 to M4/D1 to D4) are connected to the BSM (M1 to M4/D1 to D4) in extension chassis A. For more information on the MUX/DMX modules, see the “Multiplexer and Demultiplexer Modules” section on page 1-22. The common input or output of the BSM (MUX/DMX) can be connected to the RSM receiver or transmitter (MUX/DMX) connector.The signals of the remote link are then present at the line A and line B connectors of the RSM.

16-Channel WCM System

A 16 channel WCM system consists of two chassis. Chassis 1 includes the NEMI module and chassis 2 holds the DEMI module. Both NEMI and DEMI have to be interconnected using an external bus cable to allow management and configuration control information to pass between the two chassis. The NEMI is configurable by the customer. For more details, refer to the Cisco Metro 1500 Series Software Configuration Guide.
Chapter 1 Product Overview

32-Channel WCM System

NEMIs exchange their data over a connection and the two originally independent 16 channel WCM systems appear to the outside as a single 32-channel WCM system. When two 16-channel units are connected in this manner, the NEMI in chassis 1 is configured to be a NEMI-master and the NEMI in chassis 3 is configuredtobeaNEMI-slave. Both NEMIs are connected through their Ethernet ports to the Ethernet hub. For more details, refer to the Cisco Metro 1500 Series Software Configuration Guide.

128-Channel ESCON System

The first NEMI, installed in chassis 1, is configured to be a NEMI-master and the other three NEMIs are all configured as NEMI-slaves. All four NEMIs are connected through their Ethernet ports to the Ethernet hub. Provided that the frames are connected and configured as described, the complete system of eight
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Chassis

Chassis
frames constitutes a single unified network element with a unique Ethernet address. For more details, refer to the Cisco Metro 1500 Series Software Configuration Guide.
Each chassis of the Cisco Metro 1500 series can be mounted in a 19-inch cabinet or in open racks. Each chassis requires five rack units. The chassis houses all of the system modules required to achieve the optical communications link.
This section describes the following chassis components:
• Dimensions
• Labeling
• Airflow System
• Power Supply Module

Dimensions

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The housing is modular in accordance with DIN specification 41494 part 5. The construction comprises two aluminum sides and four aluminum cross extrusions. Standard features also include sheet-steel covers and die-cast aluminum cover extrusions. All covers are uncoated aluminum; cross extrusions, side extrusions, and handles are textured powder-coated. Figure 1-8 shows the dimensions of the chassis.
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Chassis
Figure 1-8 Outer Dimensions of the Housing
440 mm
482 mm
Chapter 1 Product Overview
222 mm
305 mm
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Labeling

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A label at the back of the unit identifiesthe system. Each WCM, RSM, and NEMI have unique serial numbers and specification codes printed on the front panels of the modules.
WCMs are labeled with alphanumeric and pictographic descriptions of their main properties. Table 1-1 provides descriptions of the WCM labels.
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Table 1-1 WCM Labels
Main Properties Specification
622 Mbps
200 Mbps
125, 155 Mbps
1250 Mbps
Chassis
WCM with clock recovery. The clock recovery is fixed to a single frequency as indicated below the symbol.
WCM with clock recovery. The clock recovery can be set to three frequencies. These frequencies are shown above and below the symbol.
Transparent WCM without clock recovery ranging from 100 to 1250 Mbps.
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100 Mbps
Local port description of WCM. Fiber type is multimode and the communication wavelength is 1310 nm.
Remote port description of WCM. Fiber type is single-mode and the communication wavelength is 1550 nm.
TDM4E with clock recovery. The clock recovery is fixed to a single frequency as indicated below the symbol.
4x200 Mbps
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Chassis

Airflow System

The airflow system includes an air intake at the bottom front side of the chassis and a fan module with two fans at the rear of the chassis. Two redundant power supplies power the fan module. The chassis internal air temperature controls the rotational speed of the fans.
The state of the fan module can either be observed through the NEMI-master or it can be read off the fan LEDs at the front side of the chassis. A green light indicates that everything is in working order. A red light signals that either a fan or a fan power supply is not working properly, which does not necessarily endanger the functioning of the air flowsystembecause there are backup fans and fan power supplies. Refer to the Cisco Metro 1500 Series Software Configuration Guide for more information about fan observation using the NEMI-master. The ocmstate-f provides information on the fans.
You can check the fan module status on the display panel at the front of the chassis and through the NEMI. For more information about using the NEMI to check the fan status, refer to the Cisco Metro 1500 Series Software Configuration Guide.
Chapter 1 Product Overview
Caution The fan system can only be replaced by Cisco-trained and -certified
technicians.

Power Supply Module

The Cisco Metro 1500 series system provides high reliability in data and telecommunication applications because it has two identical, fully redundant power supplies. Each power supply can take over the power needs of the entire system. These power supplies provide 5V at 30A to the system, and full input-to-output, input-to-case, and output-to-output isolation. For detailed information on the power supply and how to replace it, see the “Determining Power Supply Status” section on page 3-23.
The state of the PSMs can either be observed through the NEMI-Master or it can be read off the LEDs at the front side of the frame. If both PSMs are working the green or red power LED is lit, otherwise there is no light at all.
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